Guitar plectrum



FIG. 1 is a top plan view of a guitar plectrum showing my new design, the undisclosed bottom plan view being a mirror image thereof;

FIG. 2 is an end elevation thereof;

FIG. 3 is a lower side perspective view thereof;

FIG. 4 is an upper side perspective view thereof, the broken line showing of a fragmentary human hand being for illustrative purposes only and forming no part of the claimed design, the upper side being a mirror image of the lower side perspective view shown in FIG. 3; and,

FIG. 5 is an end elevational view opposite of that shown in FIG. 2. 

The ornamental design for a guitar plectrum, as shown and described. 